21311223030032 has 20 divisors (see below), whose sum is σ = 44466686515020. Its totient is φ = 9835949090688.

The previous prime is 21311223030029. The next prime is 21311223030043. The reversal of 21311223030032 is 23003032211312.

It can be written as a sum of positive squares in 2 ways, for example, as 12128892814336 + 9182330215696 = 3482656^2 + 3030236^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51228901307 + ... + 51228901722.

It is an arithmetic number, because the mean of its divisors is an integer number (2223334325751).

Almost surely, 2^{21311223030032} is an apocalyptic number.

It is an amenable number.

21311223030032 is an abundant number, since it is smaller than the sum of its proper divisors (23155463484988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311223030032 is a wasteful number, since it uses less digits than its factorization.

21311223030032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102457803050 (or 102457803044 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21311223030032 its reverse (23003032211312), we get a palindrome (44314255241344).

The spelling of 21311223030032 in words is "twenty-one trillion, three hundred eleven billion, two hundred twenty-three million, thirty thousand, thirty-two".